Or I’ve been told to connect the green screw to the incoming cold water pipe. ya I don't charge my family money either ha ha. >>. In newer installations where there is a 2-wire with ground cable for a 240 volt water heater the white wire is colored with red electrical tape which clearly designates it’s part of the 240 volt circuit. Dave, Electrical Questions and Electrical Answers, Electrical Wiring for a Garage and Recreation Room. No need to worry about electrical codes. This is standard for new home construction. 220 Volt Wiring Diagram, This link is helpful as a Handyman • Can the temperature and pressure relief (TPR) valve discharge pipe for a mobile/manufactured home water heater terminate under the home? This is standard for new home construction. Caution: To prevent severe shock or electrocution always turn the power OFF at the service panel before working with wiring. What is the difference between a regular water heater and a direct vent water heater? Also see our blog posts What is required clearance for access and working space in front of an electric water heater? I found this box connected between the 240v line from the fusebox and the water heater and I'd like to know what it's for. • Does a tankless water heater require a pressure relief valve? The upper thermostat is faulty, but I can find a replacement that is exactly the same. • Why is my water heater making strange (rumbling, gurgling, knocking or banging) noises? Water Heater Wiring This electrical wiring question came from: Cheri, a Homeowner from Wichita, Kansas. Visit our ELECTRICAL and WATER HEATERS pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles. Why is an older water heater an insurance problem? 2 are labled "line" and 2 are labled "load." The side of the meter that receives incoming power from the utility service lines is called the "line" side. Identify the circuit for the hot water heater and make sure it is turned off. Hi Tom, What does it mean when a gas appliance (water heater, furnace, or range) has been "red tagged"? The wires that connect here feed the electric service panel in your home. I hope this helps you, Water Heater Circuit • How do I determine if a water heater is gas or electric? These wires connect to the disconnect breaker installed within the disconnect box. Each of these configurations involves specific wiring techniques and requirements that are not interchangeable. Can you use a light switch for a water heater disconnect? What is the difference between a single element and dual element electric water heater? 1" gas line, with a drip. • Why do water heaters have a sacrificial anode? At the point of connection, there is typically a knock-out opening where a flex conduit with the circuit wiring may be attached directly to the water heater. What is backdrafting at a gas water heater? A typical water heater requires a 30amp 240volt dedicated circuit which includes a ground wire. If you are still unsure of how to properly wire the circuit you are working on, you will need to contact Where do I find the water heater in a mobile home? This is for new construction. The information provided is general installation advice. Never Assume the power is off! I hope this helps, Older homes may have 150-amp, 100-amp or lower service capacity. We make no claims about the completeness or the accuracy of the information as it may apply to an infinite amount of field conditions. Unlike a new electric dryer for example, which has a 120 volt control timer, an electric water heater does not yet have 120 volt controls. Electrical disconnects are switches that isolate all wiring in a home or other building from the source of power, typically the utility power service. Do we just wire to the switch, and then the heater comes with wire to the other side of the switch? Thanks for the help! The disconnect switch does not shut off the power in the feeders lines or at the switch connections. This wire is marked with white phasing tape to signify that it is the neutral wire. If you do choose this option, the switch be 30-amp rated (not a regular light switch). • What is the difference between a single element and dual element electric water heater? What is the difference between a regular water heater and a power vent water heater? I have been seeing that the water heaters are super important. The total voltage, when measured between them, is around 240 volts. It is important to note that electrical codes change, and that in some areas local electrical codes are not the same as the National Electrical code. Verify the Water Heater Electric Circuit Does a tankless gas water heater still work with no electricity during a power outage? Why is the water heater older than the house? • When is a water heater drain pan required? • How does a hydronic heating system work? I guess I will go ahead and use the pull switch I bought at HD, sounds like it is all I need.